Motorola Corporation

Motorola Solutions, Inc.

Branko L Avanic

Peter J Yeh

Joseph J Medvid, Iii

Leng H Ooi

Wayne M Phang

John K McKinney

Anthony J Suppelsa

Lorenzo J Cruger

Dang N Vu

Hiep T Dang

Charles R Ruelke

Armando J Gonzalez

Richard S Young

David C Everest, Iii

Mahes M Ekanayake

Robert L Benenati

Kevin D Walkup

Shakeeb Z Khan

Tan V Dinh

Joseph J Medvid

Robert E Stengel

Ellis Arthur Pinder

Joseph P Heck

Raul Salvi

Kenneth David Cornett

Richard B Meador

Cesar W Carralero

Robert G Kinsman

Rajesh H Zele

Edmund Amartei Laryea

David L Stolfa

Richard J Kolcz

David W Henry

Chirayu M Patel

Yusuf L Erbora

Carl M Thielk

Frank A Poggiali

A holster () formed a body wearable housing (), a cable (), and a holster antenna () provide retention for a portable communication device () along with remote antenna coverage to another portable communication device () via the holster antenna ().

Holster providing antenna coverage

A portable device includes set of charger contacts and a set of battery contacts. The battery contacts mate with corresponding contacts of a battery pack used to power the portable device, and the charger contacts allow charging of the battery pack while connected to the portable device. The battery pack includes an undervoltage protection circuit that opens when an undervoltage condition occurs across the battery pack contacts. The portable device further includes short circuit protection element connected between corresponding contacts of the set of battery contacts and the set of charger contacts that, upon a short circuit condition occurring at the charger contacts, prevents the undervoltage protection circuit from tripping and opening.

Short circuit protection for a portable device powered by a battery pack having undervoltage protection

A method for transmitting a communication generated by an originating device to a target device using a repeating device is provided. In the method the communication is transmitted from the originating device and received at the repeating device. A repeater request sequence is transmitted from the originating device and retransmitted from the first repeating device to the target device before the repeater request sequence is received at the first repeating device.

Fast access asynchronous repeater wakeup protocol

Methods of enabling late entry into an on-going spread spectrum call are described. A late join frame replaces, and has the same size as, a traffic frame. A late join slot in the late join frame contains sufficient information in preamble and sync subframes to permit a target to join the call. The traffic slots in the late join frame replicate data such that call quality of the call is substantially unaffected if one of the remaining traffic frames is not received. The preamble and sync subframes frequencies may be the same as, or different from, preamble and sync frames frequencies during a call establishment phase of the call. If different, the preamble and sync subframes frequencies are selected from one or more frequencies. Use of the preamble and sync subframes frequencies is compensated for when selecting the traffic slot frequencies to obtain uniform utilization of the spectrum.

Method to facilitate late joining of a call

A technique for activating a transmit mode of a communication device () is provided encompassing the steps of generating a light signal on an outer surface of the communication device; inhibiting the light signal; and activating the transmit mode of the communication device in response to the light signal being inhibited. A communication device () operating in accordance with this technique includes a light transmitting device (); and a sensor () for sensing light generated by the light transmitting device, the sensor disabling a transmit mode when light is detected and enabling a transmit mode when light is inhibited.

Method and apparatus for transmitting in a communication device

A communication device () includes a first communication block () for operation within a first communication network (); and a second communication block () for operation within a second communication network (). The communication device () further includes an audio control () for at least one microphone (). The audio control () is coupled to the first communication block () for receiving a first audio input for operation of the first communication block () and is coupled to the second communication block () for receiving a second audio input for operation of the second communication block (). A low noise ground () is isolated from a common ground () of the communication device () to facilitate the sharing of the at least one microphone () between the two communication blocks.

Communication device and method of operation therefore

A communication device () includes a cordless telephone () and a two way radio (). The communication device () is adapted to place an active cordless telephone call in a low frequency mode in response to receiving an incoming two way radio communication. The communication device () is adapted to then establish communication within the two way radio communication. The communication device () periodically re-establishes the cordless telephone call to maintain communication with a cordless base station () until the two way radio communication is completed.

A receiver ( ) includes an antenna ( ), a preselector ( ), an amplifier ( ), a mixer ( ), a filter ( ), a signal strength measurement circuit ( ), a radio frequency signal detector ( ), and a processor ( ). The processor ( ) is programmed to receive a signal indicator level ( ) from the signal strength measurement circuit ( ), generate an automatic gain control command ( ) based on the received signal indicator level ( ), and send the automatic gain control command ( ) to the amplifier ( ) to control a gain of the amplifier ( ). The processor ( ) is programmed to receive an off channel signal strength ( ) from the radio frequency signal detector ( ), compare the off channel signal strength ( ) to one or more threshold levels, generate a filter command ( ), and send the filter command ( ) to the filter ( ). The filter command ( ) identifies a cutoff frequency for the filter ( ).

Receiver for audio enhancement and method therefor

A substrate,has an electrically adjustable trim pad,on the bottom side. A circuit pattern,resides on the top side, covered by an RF shield,. The trim pad is located on the bottom side directly below the RF shield, and is electrically connected,to the circuit pattern. A number of surface mount connections,, typically C5 solder bumps, are located on the bottom side, and surround the trim pad. The trim pad is trimmed after the RF shield is attached, thus providing more accurate tuning of the circuit on the top side.

Substrate having trim window in a C5 array

A phase noise optimization circuit (,) minimizes phase noise for a voltage controlled oscillator (VCO) (,). Control circuitry (,) locates a minimum phase noise region for VCO operation based on the slope of the VCO's changing control voltage (,) versus changing bias voltage (,) for a bias voltage range. The control circuitry (,) then adjusts the bias input so that the VCO operates in a region of minimum phase noise.

Method and apparatus for reducing phase noise in a voltage controlled oscillator circuit

A radio receiver operates primarily in a first operating mode to process received signals (410). When a carrier signal detect is triggered while in the first operating mode (415, 420), the receiver temporarily operates in a second operating mode which has receiver parameters selected to reduce carrier detect falsing when compared to the first operating mode (430). Preferably, in the second operating mode, the receiver's frequency and time response characteristics are modified to facilitate carrier squelch detection. Carrier squelch is performed if a carrier signal detect is triggered while the receiver operates in the second operating mode (440, 450, 460, 470).

Carrier squelch method and apparatus

A self-tuning VCO (116) receives a control voltage input (Vcont) (114) and an adjustable programmable voltage (Vadj) (122) and provides optimized locked conditions even under variations in temperature. A radio temperature is measured and stored (204) while Vadj (122) is initialized and stepped and Vcont (114) attempts to lock the VCO on frequency. Once a locked condition is achieved, the Vcont (114) is monitored to determine if it falls within a predetermined voltage range. If a non-optimized condition is detected, then the Vadj (122) is automatically adjusted until the VCO (116) becomes locked with a Vcont which falls within the predetermined voltage range. When a locked condition is achieved, the radio temperature is monitored and compared (212) to the original stored temperature (204). If a temperature threshold limit is reached (216) then the VCO is re-checks itself for a locked condition and re-optimizes itself to accommodate for the variations in temperature.

Self-tuning and temperature compensated voltage controlled oscillator

An oscillator circuit (100) provides improved noise immunity by utilizing a differential common base configuration. The oscillator includes a differential transistor pair (102, 104) having common bases (110) coupled through an AC ground (108) and emitters coupled through a differential common mode point (120). First and second resonant tank circuits are each referenced to the differential common mode point (120) for generating a differential output (OUT, OUTX).

Oscillator circuit having a differential configuration and method of

A high Q integrated inductor-capacitor (L-C) resonator (200) includes a planar inductor (201) having a plurality of turns and a serially connected first and second capacitor (205, 207) that is connected in parallel with the planar inductor (201). The first and second capacitors (205, 207) are positioned within at least one turn of the planar inductor (201) for reducing the parasitic interconnection resistance between the planar inductor (201) and first and second capacitor (205, 207) and also increasing the Q factor of the L-C resonator.

High Q integrated resonator structure

A voltage controlled oscillator module (100) (400) provides tuning capability for the VCO in a shielded environment. The module includes a trimmable capacitor (110) (410) having metal plates (112, 114), (412, 414, 416) capacitively coupled through the substrate. One of the metal plates (114) (416) is a trimmable plate which can be trimmed to tune the VCO frequency. The trimmable metal plate (114) (416) remains exposed on the bottom surface (108) (408) of the substrate (104) (404) so that the frequency of the VCO can be tuned while the reminder of the oscillator circuitry (102) (402) on the top surface (106) (406) is encapsulated by a ground shield (116) (418).

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Miami, FL, United States of America

Branko L Avanic